Outfits and Headgear are cosmetic only items. You can select 1 out of 4 outfits at the character creation screen. You can obtain outfits by completing some Pursuits, some Missions or purchase them from the game store.
Outfits are the entire appearance from the neck down and Headgear is the head only.
Factory Machinist Headgear
Machinist Supply Crate from the Defiance Store
Ferik's Mask Headgear
Quest reward from Shanje Liro: Ruling Caste Arena
Forest Survivalist Headgear
Survivalist Supply Crate from the Defiance Store
Transferred if owned in Defiance Classic
Gemini XIII Headgear
Triple Costume Pack released October 2015
Watch 15 minutes of the Defiance 2050 launch livestream on July 13 2018
Transferred if owned in Defiance Classic
Halo Headgear
Reward for playing one hour during the Extra Life Event 2014
Transferred if owned in Defiance Classic
Happy Pumpkin Headgear
Halloween Event 2014 or Blackened Hellfire Supply Crate
Hellbug Combat Cap Headgear
Buying the Season Pass
Transferred if owned in Defiance Classic
HV-3C "Havoc" T.I.T.A.N Headgear
Obtained from the Havoc T.I.T.A.N Bundle from the Defiance Store.
Transferred if owned in Defiance Classic
Infantry Veteran Headgear
Supplies (Earth Republic Camp)
Transferred if owned in Defiance Classic
Stratotech Defiance 2050 [Source]
3PL9 WDFG DKPR 9LE7 P7Y7 [Redeem]